Ender. Happened back in the days with a 3v2, the stepper drivers on the original mainboard overheat, causing it to ‘miss’ steps.
Replaced the MB with an improved version, tuned the vRef and never had any issues again.
You might look into tuning the vRef for your machine.
Not medically trained or experiencing any illnesses, but keep this in mind:
In just a few years, the medical world made huge steps in treating a lot of things using RNA techniques.
Don’t compare a situation 10 or 20 years ago with the possibilities today.